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"Some visitors to the site were greeted with a message that read 'Sorry, something went wrong. We're working on getting this fixed as soon as we can,' " Reuters reported.

According to Mashable, the outage began around 12 p.m. ET. "Users began to regain access to the site about 30 minutes later, according to various tweets," Mashable reported.

A message posted on Facebook's developer page said, "Facebook is currently experiencing an issue that is affecting all API and web surfaces. Our engineers detected the issue quickly and are working to resolve it ASAP. We'll update shortly."

During the outage, the hashtag #FacebookDown was a top trending topic on Twitter.

This is the second Facebook outage in as many months. The site also went down for about 30 minutes in June.